Once you have finished importing your video clips it is easy to add additional MP3 sound tracks, captions, animation, photos, logos or other features available in Flash. I am not going to describe how to do this as these types of effects are detailed in many of the other tutorials on this site. But I would suggest that you lock the two layers that you have already created and do additional effects in new layers.

One other point to remember is that on sites like youTube you cannot upload the Flash Movie as you normally would on your own site - you need to convert the file back to a Movie. So there is no point in adding anything interactive, like buttons or forms as these will not work.